Canabalt terrifies me. It says something when a game that even the developer admits took just two weeks to write can set my pulse racing far faster than any Hollywood blockbuster or hi-def zombie fest on a console. Either I have simple tastes or Canabalt is special.

It isn't the most complex of games you'll ever come across, or the longest, but it's alluring nonetheless.

A plain take on free running, Canabalt is all about charging across a series of rooftops for as long as you can, jumping over pitfalls at pace and avoiding scores of objects that litter the way. Taking 2D form, your only input is to tap the screen when hazards pop up, your little man leaping into the air though never relenting in his sprint forward.